Joseph olmsted



J. OLMSTBD. MAGNETIC GAR BRAKE Mya/76h @uitrit intra atcat @fitr-.

IMPROVEMENT IN MAGNETIG BRAKES FOR GARS.

@te Stimmt maar la in ttes: @titers tant tnrnmkiiig pitt uf tige 'santa TO ALL WHOM IT MAY' CONGERN: f

Be it k-nown that I, JOSEPH' '-Onnsfrnn, of Knoxville, inthe county of Knox, and State of Illinois, have invented and discovered a new andusefulf'Improvcment in Operating Brakes upon Railroad' Cars; and I do hereby declare and make known that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and the letters and figures marked thereon, which form part of this specification.

My said invention consists in a novel'arrangemcntmpon a train of cars, of magnets and an electric circuit extending throughv the'trnin, which is `opened and closed by a key, in connection' with certain mechanical devices connected with the brakes, whereby the movementsof the armatures of the said magnets, caused by the' opening or closing. of said circuit at the key, shall instantaneously and simultaneously operate the brakes upon all the cars, bcthto apply and to release them.

To enable thcse skilled in the art to understand how to construct and use my invention, I will proceed to describe the same with partieularity, making reference inso doing to thc aforesaid'drawings, yin which- Figure 1 represents a plan or top view of my invention'.

Figure 2 is-a vertical section taken at the line a: in figs. 1 and 3; and

Figure 3 is a bottom view of one truck of car with my invention'applied thereto.

The same letters of reference in dilerent figures indicate like parts of myinvention; and in g. 1 part of theiloor of v'the ,car Viszbrcke'n c`."w:1.y ,sn` as -toxshcw the arrangement thereof beneath.

A represents thel truck -frame,.wn1cl1 .is constructed substantially in the usual manner, and ,B represents. the wheels thereof. C represents a strong bar or beam, upo'n .which is supported -:tn-ordinary electro-magnetic Sp0ol,`marked D, of suitable size and strength for the purposes hereinafter speciied. s Erepresentsa soft iron bar or armature,-arr anged in the proper position with 'respect to the poles of said electrmagn'et, I), upon the upper end of the lever or arm F, which is hinged in some suitable manner `at its lower end, at f, so as to permit a motion of the armature E towards and from the magnet D, as desired, being prevented from receding. so far as to be beyond` theattraetive influence of said magnet, by a stop e, as shown. G represents a. horizontal shaft, supported in .suitablebearings7 one end thereof` being arranged contiguous to the arm F, said shaft 'having a longitudinal reciprocating movement in its aforesaid bearings. Upon said shaft is fixed rigidly a circular plate, marked H, and. it is also provided with another circular block or plate, marked J, which is so arranged as to revolve with `the shaft whensaid shaft is revolved, but allows said shaft to have its aforesaid longitudinal motion, independcntfrom said wheel. or plate J, said` plate resting against a suitable washer, g, between it and the bearing f the shaft as shown. Between the said plates .H and J there is a cog-wheel, marked I, which revolves freely upon s'aid shaft, except as hereinafter specified. The said wheel I gears into or with a spur-wheel, mark-cd'QK, iied upon the axle of 'one pair of the wheels, and revolves therewith. L is a cord or chain, one en d of which -is secured to the said shaft G, and the other is attached to the lever M, which isv connected lwith the brake N at the point m, and to the brake I? by the cord or chain o, as shown. .a a represent the electric circuit .passing around the spools D and through a battery of suitable power, b, one pole terminating in the plate d, and the other in a key, c, by which said circuit may be closed when desired, it being open when the brakes are not in operation.

"When it is desired lto break upthe train, the engineer, or person whose duty it may be to attend to the matter, closes 'the circuit by simply pressing the key c down upon the plate holding it in this position as long as the brakes are required to operate. As the circuit is closed the current of electricity passing around vthe spools of the magnet D develops their magnetic force and attracts the armature E thereto and holds it firmly upon the magnet. lThis movement of the armature gives a'corresponding motionto the lever F, which presses upon the endet 'the shaft G, sliding it along, as aforesaid, 'and forcing the plateI against the gearwheel 'I,. which, being rmly held between the clutches H and J, revolves the shaft Gr, winds the chain L upon the same, thus applying the brakesN P-to the wheels, as desired. 4To release the brakes, the key e is released, thus opening the circuit and destroying the. attractive power of the magnets, when the armature recedes, the clutches H J relax, and-the brakes are released.

Instead of `having the magnet stationary, and the armature movable, the magnet may be movable and the Losev armature stationary; in which -case the leiver F weuld be attached to the magnet, instead of the armature. The battery should be arranged in sections, so that bythe employment of suitable switches or cuto4s the circuit may be made to pass through any desired'number of cups, thus producing any desired degree of power in the application of the brakes. 'Iliere is to be a magnet arranged upon each truck, as shown. Suitableb couplings should 'be made in the circuit to connect the same between the different cars, which may be sol constructed aste close-automatica1ly and complete the circuit, when one or more cars may be detached fromthe l train. The key for closing and opening-the circuit may bc arranged upon the engine, or in any other part of .the train, as desired or found expedient,

But having described the nature and operation of my invention, and one mode whereby the same maybe applied, I will now specify what I claim, and'desire to secure by Letters Patent:

1. I claim the arrangement of the Vmagnet D, armature E, levenF, with the shaft G, clutches H J, and gear-wheel I, operating substantially as and for the purposes described.

2. I claim the combination and arrangement of the shaft G, clutches H J', gear-wheel I, and spurfivheel K, with the axle, substantially as shown and described. i v

JOSEPH ,OLMSTED i Witnesses:

H. N. KEIGHrLnY, J. E., Ewnra.A 

